ARC M300 MKII call for help

Just spoke to High End Audio Repair in Brooklyn. They also do not repair the M300’s anymore, siting their weight as the determining factor. Bummer.

Greg Christensen was the responding repair team tech. He still had a record of a 2016 servicing of one of the mono blocks. Thanks for the suggestions. I will pursue and report back. Here is the correspondence from ARC.

Dear Scott

Summary: I see your amplifiers were last here in 2016 according to our records. Unfortunately we are no longer able to provide parts or service for the M300 or M300 mk2. Too many of the parts used in that model have become obsolete and we do not have modern replacement parts that will work in that design. I'm sorry to have to give you the bad news but I'm afraid we will not be able to work on this unit for you.

Thank you,

Greg Christensen
Audio Research Customer Service

I am very moved and appreciative of all of your very helpful and informed responses and suggestions. I have a few feelers out using some of the sources you have indicated, including sending pictures of the area affected.  My wife commented on the quality of people I have almost always come in contact with in the audiophile community. I have procured a pair of PS Audio BHK 300’s from an enthusiast in Phoenix, and am very impressed as an initial impression. I am sure technology has made strides since the M300’s’ introduction. But they are worth saving, I think, if at all possible. Like me, they may be dated, but not ready to be retired!